Shower mixer tap



FIG. 1 is an isometric view of a shower mixer tap according to our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a first side view thereof;

FIG. 4 is a second side view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a top view thereof.

The views not shown form no part of the claimed design. 

CLAIM The ornamental design for a shower mixer tap, as shown and described. 